2155422056 has 16 divisors (see below), whose sum is σ = 4063996800. Its totient is φ = 1071689584.

The previous prime is 2155422053. The next prime is 2155422067. The reversal of 2155422056 is 6502245512.

It is not an unprimeable number, because it can be changed into a prime (2155422053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751160 + ... + 754023.

It is an arithmetic number, because the mean of its divisors is an integer number (253999800).

Almost surely, 2^2155422056 is an apocalyptic number.

It is an amenable number.

2155422056 is a deficient number, since it is larger than the sum of its proper divisors (1908574744).

2155422056 is a wasteful number, since it uses less digits than its factorization.

2155422056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505368 (or 1505364 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 2155422056 is about 46426.5231952598. The cubic root of 2155422056 is about 1291.7469383306.

Adding to 2155422056 its reverse (6502245512), we get a palindrome (8657667568).

The spelling of 2155422056 in words is "two billion, one hundred fifty-five million, four hundred twenty-two thousand, fifty-six".